Xitami testssi.ssi HTTP Header XSS

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(13841);
  script_version("1.18");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");
  script_bugtraq_id(10778);

  script_name(english:"Xitami testssi.ssi HTTP Header XSS");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a script that is affected by a cross-
site scripting flaw.");
  script_set_attribute(attribute:"description", value:
"The remote Xitami server is distributed with a script for testing
server-side includes, '/testssi.ssi'.  This script is vulnerable to a
cross-site scripting issue when sent a request with a malformed Host
or User-Agent header.  An attacker may exploit this flaw the steal the
authentication credentials of third-party users.");
  script_set_attribute(attribute:"see_also", value:"http://www.oliverkarow.de/research/xitami25c1_testssi_XSS.txt");
  script_set_attribute(attribute:"solution", value:
"Remove the test script '/testssi.ssi'.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(20, 74, 79, 442, 629, 711, 712, 722, 725, 750, 751, 800, 801, 809, 811, 864, 900, 928, 931, 990);

  script_set_attribute(attribute:"plugin_publication_date", value:"2004/07/26");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses : XSS");

  script_copyright(english:"This script is Copyright (C) 2004-2022 Tenable Network Security, Inc.");

  script_dependencies("http_version.nasl");
  script_require_ports("Services/www", 80);

  exit(0);
}

#
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");

port = get_http_port(default:80);

banner = get_http_banner(port:port);
if ( ! banner ) exit(0);
if ( ! thorough_tests && "Xitami" >!< banner ) exit(0);


r = http_send_recv3(method: "GET", port: port, item: "/", version: 11, 
  add_headers: make_array("User-Agent", "<script>foo</script>") );
if (isnull(r)) exit(0);

if ( "<script>foo</script>" >< r[2] )
{
 security_warning(port);
 set_kb_item(name: 'www/'+port+'/XSS', value: TRUE);
 exit(0);
}